Windows on Windows: Difference between revisions

Revision as of 08:30, 21 July 2020

Revision as of 02:27, 22 August 2020

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| license = [[Proprietary software|Proprietary]] [[commercial software]]

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In [[computing]], '''Windows on Windows''' (commonly referred to as '''WOW''',<ref>{{cite web|url=http://support.microsoft.com/kb/181333|title=WOW Environment Remains in Memory After Quitting 16-Bit Program|website=Support|publisher=[[Microsoft]]|accessdate=February 7, 2017|date=February 22, 2007|url-status=dead|archiveurl=https://web.archive.org/web/20071023060218/http://support.microsoft.com/kb/181333|archivedate=October 23, 2007}}</ref><ref>{{cite web|url=http://support.microsoft.com/kb/153544|title=Starting 16-Bit WOW Subsystem on Windows NT Server|date=November 1, 2016|accessdate=February 7, 2017|website=Support|publisher=[[Microsoft]]|url-status=dead|archiveurl=https://web.archive.org/web/20070509051612/http://support.microsoft.com/kb/153544|archivedate=May 9, 2007}}</ref><ref>{{cite web|url=https://support.microsoft.com/kb/220159|title=Disabling the MSDOS and WOWEXEC Subsystems on Terminal Server|date=November 1, 2006|website=Support|publisher=[[Microsoft]]|accessdate=February 7, 2017|url-status=live|archiveurl=https://web.archive.org/web/20080113000651/http://support.microsoft.com/kb/220159|archivedate=NovemberJanuary 3013, 2008}}</ref>) is a [[compatibility layer]] of [[32-bit]] versions of the Microsoft [[Windows NT]] family of [[operating system]]s that extends [[Virtual DOS machine#Windows NTVDM|NTVDM]] to provide limited support for running [[legacy code|legacy]] [[16-bit]] programs written for [[Windows 3.x]] or earlier. There is a similar subsystem, known as [[WoW64]], on 64-bit Windows versions that runs 32-bit programs.

==Background==

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* [http://www.microsoft.com/technet/archive/winntas/training/ntarchitectoview/ntarc_5.mspx?mfr=true Windows NT subsystems]

* [http://kb.iu.edu/data/acxn.html What are NTVDM and WOW?]

* {{cite web |url = http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/prork/preb_mon_ewvl.mspx |title= Monitoring 16-bit Windows applications |series= TechNet |publisher= Microsoft |url-status= dead |archive-date= DecDecember 25, 2007 |archive-url= https://web.archive.org/web/20071225171241/https://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/prork/preb_mon_ewvl.mspx }}

* [https://technet.microsoft.com/en-us/magazine/ff756590.aspx Optimize How Windows 7 Runs 16-Bit and MS-DOS-Based Programs]